JPS6289499A - Generating amount controller - Google Patents

Abstract

PURPOSE:To prevent an engine from irregularly rotating by controlling to reduce the energy conversion rate only within a predetermined time when an electric load increases at a predetermined value or higher. CONSTITUTION:When an electric load L increases from L0 to L1 at a time t1, rotating speed control means M5 rises the engine speed R from R0 to R1. Generating amount control means M6 of a generator M4, when the load L increases by a predetermined value Ls or more at a time t1, reduces the generating amount G of the generator M4 to a value G1 reduced from the amount G0 before time t1. When the engine speed R arrives at a predetermined value R1, the amount G of the generator M4 is raised to a value G2 in response to the speed R1.

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention can be used to control a power generation unit that converts a part of the rotational energy of an engine into electrical energy, such as an A alternator installed in a vehicle engine. [Prior art] A power generation device that converts a part of the rotational energy 1'' of an engine into electrical energy (Jl,, when the electric load connected to the power generation 1 through a power storage device increases). , the power generation)
A load resistance is generated in the device, which leads to a decrease in the rotational speed of the engine and a decrease in the amount of power generated. Like this 4

In order to avoid this, a circuit is installed to reduce the energization speed of the field coil of the generator in accordance with the decrease in the rotational speed of one carrot, so that the electric angle 4j1 is As soon as the engine rotational speed decreases, the amount of power generated is suppressed and the load resistance of the generator is reduced! There is a device (Japanese Utility Model Publication No. 59-1897198, hereinafter referred to as Prior Art 1) that avoids a decrease in the rotational speed of the engine by doing so. In addition, a transmission is installed on the transmission path connecting the engine and the power generation device to prevent a decrease in the amount of power generated when the engine rotation (degrees)* falls below a predetermined value. In order to achieve this, the transmission is controlled so as to perform an increased speed transmission that increases the rotational speed of the power generated by one angle of the engine rotational speed.
01933, hereafter conventional technique 1+1iJ2 which one. ) or there is. [Problems with the invention] In contrast to the above-mentioned prior art, in prior art 1, the electrical load increases and
The rotation of the engine j is low and small in the courtyard (the avoidance is cold), but since the power generation part is reduced, the discharge skewer from the condenser is charged?J'4 goes around once, and this state is 1% lL'r li1 If it continues, there is a problem that the capacitor will fall into an over-discharge state. Shino, the load resistance of the power generator is low/=me The engine rotational speed has decreased significantly, and the rotation is irregular.
If so, please stop! 1 (there is a risk of crashing). For these, using a circuit that performs feedback control of 2 [engine rotation] * degree, when an electrical angle of 6/1 is added, 121. Increase the engine speed lQ,
A method d1 can be considered that prevents both the decrease in the engine's N rotation speed [q and the decrease in the power generation h1, but in this case, if the increase in the electrical angle jl is sudden and large due to v1, then the mechanical Misery 1 t'1 etc. J, actual t= , -
Until the rotational speed of the engine reaches -t't (this 11.
Because it takes about 1 hour, after the electric load is applied until the rotational speed of the engine actually reaches its maximum level, the negative resistance caused by the power generation device in the engine is still large. -■- Irregular engine rotation ＼ゝ), 151 in a severe case, during which the engine may stop. [Means to solve the problem] 1-41 minutes! The configuration CI adopted by the present invention to solve the I'ri point is as follows. 1 hour I3 As shown in Fig. 1, ■ When a part of the rotation energy of engine M 1 is supplied to various electrical loads M 2 , an electricity F channel is used to store electricity in capacitor M 3 . −1” power generation device M/′I
In the power generation amount control device used in i''lIsaI!, rotational speed control means M5 for reducing the rotational speed of the engine M1 to a low F in response to a decrease in the electrical angle iFIM2; From the time when the electrical load M2 increases above a predetermined value in + L, only until the rotational speed [8 engine rotation detected by the detection means M6] * exceeds the predetermined value, ■-
From rotational energy of engine M1 to electrical energy = 5
= Power generation that controls the reduction of the conversion rate! T3 control means M7 and an early intervention control system 1EIl'r%:Wr. Here, the electric load M2 includes electric circuit components that consume energy.For example, in a vehicle, headlights 1 to 1 are included. Su A7 Uf Todeno A Hemlock etc. hit Dere. Power generation device M/11a [- This is a device that generates the rotational force of the engine M1 by hand and converts it into electricity 1 energy using electromagnetic mechanics internal work 111, and is installed on the vehicle (13 (J, 71
Although an alternating current generator such as a Rutherford generator is used, a direct current generator is used in the invention. There is no change in its effect. In any case,','1lf41
= l(-I for the magnetic field created by J and excitation +4
This utilizes electricity induced in the excitation coil by the phase 1 motion of the 1-ille. The rotational speed control means M5 and 131 detect the speed of the electric negative die iM2 by, for example, a current hl installed in the circuit thereof, and accordingly detect the speed of the normal intake air path of the IT engine 1, for example. Separately from each other in parallel (setting (-J) the thrower 1 hell valve bypass blade adjusts the air flow gutter of the bypass air passage and controls the opening of the idle control valve = 6- Control 1 Jru 19 cost The engine rotation speed [α detection means M6 is proportional to the engine rotation speed generated from the distrivia I-ta, which is connected to the engine engine engine shaft through the gear 7, and the 62 pulse transmission A circuit is illustrated in which the number of pulse signals within the range A (1'71f)% is calculated by h1.3 Power generation 111.
The control means M7 performs conversion rate reduction 111 control, including the case where the conversion rate is zero, to stop the conversion from the rotational T-channel of the engine M1 to the electric T-channel 1''.
No. 114, one example, λ, each electric negative W: iM2
Converts the potential signal into a potential signal, and converts the potential signal into a predetermined voltage ((potential and f) set by the resistor 617.
Compared to ff, electricity negative i! i j? h is the predetermined voltage 4;
A power generating device controls the rotation of the F engine M1 according to a signal from the comparator and a signal from the T engine rotation speed detection means MO. Transmitted to FJf M 4 or Buddha 41
An example of means is an electromagnetic clutch that performs the following operations. In addition, instead of an electromagnetic clutch, a speed control device is installed between the engine M1 and the power generation device M/'l, and changes the speed IL between the two by an electric signal. 3 [Function] The means for controlling the electricity W flowing through the field field of the generator M4 by the electric load suspension signal Yj can be considered as the power generation r15 control means M7. The action of the component line is exemplified in Figure 2. Timing 1 (・-I- reveals M5a. 7111 increased from 1..1 to 1.
1) Assuming that 1 rotational speed control means M', N, 1 detects an increase in this electric i-i air m [Execute the operation to make ku1 -15'r,
- According to the machine assistant/PI of engine M1, the engine rotational speed actually reaches the specified value 1 at time 11J, and between 11 and Δ11 (J delay 1] time t
2. Howl. On the other hand, the power generation 'r'tii'i M4 that supplies electricity 1 energy to the electric load M2 and the capacitor M3? ] Item 11
Control means M7t, electric load amount 1 or predetermined fif'+l
s since 1 (J11! Company 1 ll' + point tli:ilj
When the power generator M40 is turned on, the engine M1 is rotated.
[■ Reduce the conversion rate from Nehru 1' to electric T energy by 11℃! (At the time of the change, the power generation was decreased from 100 to 100% before that time (+1'+01). Here, the decrease was
! 89 is set to a value such that the engine M1 does not stop when the maximum of the electric power generation-GILt1 and the electric load loss 1-1 occurs. - The engine rotation speed R is always detected by the engine rotation speed 1α detection means M6, and when the value reaches a predetermined value [11.1 point 1-2, the power generation amount control means M7 is The conversion rate of the electric power supply speed G of the power generation key W M'l from the rotational T energy of the engine M1 to the electric T energy should not be redundantly changed. 1
According to! ,=(straight 02
From the value 11 in 1- below to the value l-2 which is less than the predetermined value is -
) In the next step, the rotation j medium control means M5 immediately changes the rotation speed from the previous value R1 to 1 point 1:3 to the lower value R1. Execute the operation to avoid the drop, and also perform any operation for the power generation skewer M7.
! 1 for the G for weight generation, -11 for the decrease in engine rotational speed IQ1
V') (replacement (+++ G 01 Konaru 3°) [Embodiment 1 The configuration of the first embodiment of the present invention will be explained in FIG. 1/'ras (
→ Switch that opens and closes from the side - / 32, electricity (1 condolence j13
Between the on/off switch 32 and the electrical angle VF 33 of the circuit connected to I'm going to cum in the l-i position.
(Manual power section 34 of knee I-ta 34 a I: Detected by human power. Engine rotation 'yA: +C
In the [1
- The protrusion 35b installed around the data 35a is the pick)
'2 f] Ill 350 (Pickup 1 when approaching this
The potential generated in the coil 35c is measured by microphone [11 mpikore/1
33/1's input section 3/Ia is inputted by the human resources department, and the result of inspection is 1%. Microphone [1] In the amplifier 3/1, CP LJ 3
4b is connected to the human power section 3421, the storage section 3371O, and the output section 31d, respectively. Mike [-1-1n-
The output part 3/1d of the 1-tor 34 and (, 1 rotation'>! In
The control wiring 36 connects the solenoid valve 38a of the intake line 3ε3 of the gasoline engine 37, and the generator control signal wiring 39 connects the electromagnetic clutch 40a in the generator 40. In the intake system 3B of the engine 37, a solenoid valve 38a (JLL
The intake air flow is bypassed by connecting the passage 338G on the Tsuchiura side of the intake air flow with the passage 38d on the downstream side of the 121tsu1Heru valve 38i). The electromagnetic clutch 40a is installed in the bypass passage 38e of the engine 37 (not shown), and the electromagnetic clutch 40a is installed between the generator 10o and the pulley 40 connected to the crankshaft boob (not shown) of the engine 37 and the V-bell 1. be. Real hll! The operation of each component in the example will be described below. Third
At point d3 in the figure, when current flows through the electrical load 33 by closing the open/close switch 32, the micro
The potential entering the input part 3/1a of 34 is the same as ground 11'
1 to the same value as the charging potential of the capacitor 31. At this time, the input section 34a of the microphone [1] viewer 34
outputs an electric load signal corresponding to the electric load level to the CPU3=1b. Also, the distributor [go J-] driven by the crankshaft of the engine 37 via the
Due to the phase 41 action between the protrusion 35b of the motor 35 and the pickup coil 35G, a pulse signal proportional to the engine rotation m1llf enters the human power section 34a of the micro two motor motor 34. The input section 34a further inputs this signal to CP1. The output section is J34b. Regarding the processing in the microcomputer 1-3, IJ
. This will be described later, and here we will discuss the following effects (we will briefly describe them). When the speed 1ro signal is issued (,1, output section 34 d l;1
．． The potential of the rotational speed control signal wiring 3 (3 is raised, and when a low rotational speed signal is issued, the electric potential of (1'/) is lowered. Also, the output section 34 d 1.: CI) U 3 II b (after) 11 (When the conversion rate signal is output, the output section 3 II d increases the potential of the power generating device control signal wiring 339. , the solenoid valve 38a of the intake line 3ε3 of the 3° engine 37 which has a low potential (J, the potential of the rotational speed control signal wiring 36 is high...) will increase the opening of the valve. By increasing the amount of intake air in the bypass passage 38e, the rotational speed of the engine 37 is reduced by 1 when the electric potential becomes low, and by the reverse operation, the rotational speed of the engine 37 is reduced by 1. In addition, the electromagnetic clutch 10a of the power generation device 40 has a high potential of the power generation device control signal wiring 39 (4).At the end, the pulley 40b and the generator 40G are connected to generate electricity, and the potential becomes low. When (J) disconnects the two and stops power generation, the processing inside the microphone 34 will be explained using the frame 1]-chip-1 shown in FIG. Note that the numbers in parentheses indicate the step numbers of f1]-jer1~.When star i~ (41) is entered, the electric load signal is manually input from the input section 34a (42), and its value is manually input from the storage section 31G. Determine whether or not the predetermined value Is is a terminal vortex (
13). If the value 1- of the input electrical load signal is
When it is less than s, the output horn part 3'1 (outputs a high conversion rate signal to II 44) further outputs a low rotation speed signal (45), and then returns to the start position (46). ). This will be referred to as the first loop. In step 43, the value 1 of the electrical load signal is set to a predetermined l-
If it is determined that the engine rotational speed [α signal is input from the input unit 3/1a, the value R is manually input from the storage unit 311G and is less than the IC predetermined value R1. (/18) Here, when the engine rotational speed [[] is less than the predetermined value R1, the output section 3,
A low conversion rate signal was output for 1d 49) A high conversion rate signal was output (50) 1! , return to star i~ (46). This is called the second loop. If it is determined in step 4B that the engine rotational speed R is equal to or higher than a predetermined value R1, the process moves to step 51,
A high conversion rate signal is output to the output section 371d, and then the process returns to step 50 to output a high rotational speed signal and return to C1 star] (I!16). Take this as the third loop. To summarize the above and explain it again based on FIG. 3, when the electric load 33 increases to a predetermined value or more, the electromagnetic clutch 10a of the power generating device 40 is first disconnected, and the power generation Hjt'f is interrupted.
/I Stop power generation 1-sh, then engine 37
Rotation j′! (Starts to stand tall (second loop).-
It is detected that the rotational speed 1a of the 1 carrot 37 has exceeded a predetermined value, and at 15, the electromagnetic clarifier "14" of the power generator 40 is activated.
0a is connected, power generation) device/'l OiJ starts power generation, and the rotational speed of 1-rethane 37 (51, keeping the upper back position (m (33rd loop). Then the electric load 13
3 becomes below a predetermined value, the electromagnetic clutch of the generator 40 is connected (J: well, the rotation of the engine 37).
A; [σ1. ．． 1. However, (first loop). Honjitsu Ml: 1-cho letan 3 using the example power generation R control device
7 (J12, electric angle die i33 suddenly and significantly increased 1
10, first, in order to disconnect the electromagnetic clutch/'IOa of the power generation head 40, the engine 37 is subjected to the low resistance of the power generation device P74 (''), causing irregular rotation and It is possible to avoid the situation where the engine stops 1-.Also, when the electric engine 133 is applied, the rotational speed of the engine 37 is increased by 1-Yl. In order to resume power generation at ii'f/10, if the increase in electricity 0 and i33 is 11 for a long time, the electric power generation i% exceeding 1N of the electric angle i?i33 is specified. Is it possible to secure it after that time?
Problem of over-discharging of the storage device 31 b A [I3゜Second fruit of the present invention) + Il! Click here for an example. As explained based on FIG. 3, in the present invention (1), the first actual yarn example and the part IJ of the power generating device 40 (only the part 26 is the same, and the other parts are the same.1) %'!Changing, Mike E]" Figure 4 on page 1-34 Same-C
Is there a power generation F-control signal j-31fl Wiring 39's potential low, J, S, power generation) is placed/I O rotation-T energy is electrical 1 energy (J changes the conversion rate Part - (
An explanation of the actual example of ff!1 and the upper part of the 5' l +l j is based on the figure below.Output of the engine 61 1x61a etc. A) Retan-Taro 2's rotating shaft 62E1 It is said that between (,15, sea urchin speed); , the output shaft 63d of the transmission 63 and the A alternator (520 rotations +
1.11 between hl+628, pulley 62 b,
63b to Vbe 11 river to 65 and ``, Pell 1~ is combined. The speed change control device 6/I has an electromagnetic hydraulic valve as its tenth component.When the electric potential of the power generation device control beam wiring 39 is low, pressure oil is supplied to the oil passage (55), and the reverse In the case of GJ, 11 oil is supplied to the oil passage 66. Since the transmission 63 changes the rotation speed of the output shaft 61a of the engine 61 and outputs it to the output shaft 63a, the gear 67.68
．． 69, brake 70. It consists of a clutch 71, etc. - [The output shaft 61a of the retan 61 is connected to the ring gear 769
is connected to. Planetary gear 68 is lean gear A7
67 and the ring gear A769, the ring 117
The rotation shaft 670 is connected to the engagement plates of both the brake 70 and the clutch 710. Also the output of transmission 633! 11
163 a 1. ;1 is connected to the key and rear (not shown in the figure) of the planetary gear 6ε3, and is also connected to the engaging plate of the clutch 71. Further, the brake m:170 is supplied with pressure oil through the oil passage 65, and engages the rotating shaft of the ring gear A767 with the fixed part 611) of the engine 61. The clutch 71 is supplied with pressure oil through the oil passage 66 and rotates the rotating shaft 1 of the sun gear 67 to the planetary 1゛\/(
5B is to avoid engagement with 1=(・su)′, and the 1′ change ratio of each i′□A767, 6B, and 69 is −ρNs −Nr ((11ρ) Nc−4)− (1
) NS Nirin Yen X107 rotational speed Nr: Ring gear A 90 rotational speed NC: Planetary 1゛hiki'68 21-triator rotational speed relationship is established J, uni is set to -C. When the electric potential of the power generation device city control Shingetsu wiring 3ε] is low, the speed change control device ^0/I is connected to the oil path 6! -), 11 songs are supplied to brake 70, J, Ririn l'(' 67 is
- Since it engages with the fixed part 61 t) of the retan 61, the rotational speed of the ringgit \767 is NS7]'V]-1 and ifV),
From formula (1), Nr −(1-B))Nc
-(2>, ring-) Chang 7690 rotation speed NI
N, l, key ((1+ρ) 11'% of rear rotation speed NC
And/, [ru. The rotation speed NC of the 211 rear is
Since it is the same as the rotation speed of the output shaft 63a of the transmission (5
The number of rotations of the output shaft 63a of the output shaft 63a of the ring 1 is (1-1-()'). radius of / ringgi N7
690 and a half 1! The rotation of o Kj' il fjl 63's output 'llll63 a is caused by the rotation of pulleys 62b and 63b.
, ■ Rotation shaft 6 of A rutane 462 via 65 to bell 1
2a, when the electric potential of the power generation tom 1^ control signal bow wiring 39 is low, - "the rotational speed of the retan 01 (
31, the speed is reduced by a factor of (1-1f) by the transmission 63, and the A alternator 62 is rotated! Ru. On the contrary, the electric potential of the wiring 39 for the control line 39 of the device 11 (11 device fB 64 is the oil line 6
Supply silica oil to 6 and lean kit t= by clutch 71
67 and Planeta January 1' S768, the IJL rotation of both will be the same. If the rotation speed NS of the 1J gear 67 and the rotation speed NC of the 4-rear are equal, it is clear from equation (1) that the ring key is The rotational speed NrG of the 769 is equal to the rotational speed Nc of the Carino J. Therefore, the rotational speed of the output shaft 63a of the transmission 63 is equal to the rotational speed of the output shaft 6'la of the engine 61]a. , Kasokuki 6
3 Ll, 1 - Decrease the rotational speed of urethane 61 ffi
It is then transmitted to alternator 02. As mentioned above, the effect of the real 1M example (,1, the ( of the first example)
It is almost the same as '1, but in this example, river, electric t
The rotational speed of the resin 61 increases from the point L, t = u,) until the rotational speed of the I resin 61 increases to a predetermined value.
l, , -' The same rotational speed of l engine 61 [J, V) 'T engine 61 to reduce the zero load resistance to 1-rethane 61 in order to decelerate the negative and transmit it to l alternator 621J.
irregular rotation f) Avoiding the problem of stop 1 () while reducing the
<Add 1j5 where r also generates electricity. Next, an example IJ of TjS 3 of the present invention will be described. [
11 and FIG.
(-Minonaru only, Sen's part IJ, fi1-sama.
J Figure 4 - ('Example -711-Buyer-1 Processing (31 Same (') Is there a power generation 1 control signal wiring 3?
35) Electric power (rl high and low, J, power generation 菰IH/10 rotation T channel 1" to ?I iki ■ - energy = conversion =
20- The part that changes the rate is different from the first embodiment. The part A will be explained below based on FIG. The power generation silk control wiring 39 connects a battery 81 to a resistor 82 .
1 helangistor 83b and the relay of the field current reduction circuit 8/I;
It is connected via a. The field current reduction circuit 84 consists of a relay and a resistor 8/IC, and is connected to both ends of the resistor ε36[) via normally open relay contacts 84bl, 1 and a resistor 840 (). Alternator ε35 t, L,
Excitation ('1 Ile 85a, Field 1 Ile 85 [), Rectifier Gui A
The excitation coil 85a is a stator, the field coil 85[) is a rotor, and the field coil 85a is a rotor.
is connected to the engine crankshaft (Bot 1 in the figure) via a V-bell 1- and is driven to rotate. Field] Ile 8
When 5[) is rotationally driven, the excitation −1 ile E”S 5
a i; 1.3-phase AC voltage is generated, this 3-phase AC voltage is full-wave rectified by a rectifier diode 85G, one output end is connected to the battery 81, and the other output terminal is connected to the battery 81; The ends are connected to a field field and a small radiator router E36, including a 3° voltage regulator ε36Lt2, transistors 86a, 86b, and a transistor R/-.
It consists of die A ε36G, resistors 86d, 86e and T, etc., and detects the voltage of rose j-181, which is approximately -
The current flowing through the magnetic field 851) is controlled so that it reaches the universe H. 1st generation 86d, 1st floor of 4th block, 1st floor of rose 81,
I divided it with ε36e, and the zonobungetsu-Dengetsu was Tsu I Nagui Δ
- When the voltage exceeds the set voltage set by the electric current r[I'c, etc. of the node 86G, the transistor 86i) becomes conductive. ] Shut off the current of the power supply Lf
When <> is lower than the set voltage, 1 to transistor ε301
) is non-conducting, and transistors 1 to 8[')a/] are energized, and the field 85F) is energized, controlling the current of the field 85F). <'La3.87
iJ,, ignition switch, ε3 and 3(,1,-
111-jiu A-ning lamp, both of which are connected in series at t7-, and battery 81 and polu j-jiregi 1
- The output of the alternator 85 connected to the generator 86 is connected between -C and ε3.
91J, negative electricity (ifl) for lights, radios, etc. Next, the effect will be explained. Generator control signal wiring 39 M
If the temperature is high, 1 degree Celsius, the current 1 to transistor 83a1 is not conductive, and the transistor 1 to transistor 83b is conductive, and relay 1 is connected.
, a current flows through the coil ε34a, and the relay contact 84b becomes Δn, so that a resistor 84G is connected in parallel to the resistor ε36d. Resistor E) 6 (When a resistor of 110 is connected in parallel to j, the voltage division ratio between resistor 36e and other changes, and compared to before the 77 resistor is f+I /In, for the same battery power company) , the voltage l at the connection point between resistors ε36d and 86e,
1.Person's ``kui''ru.
t) conducts, 1-transistor ε36a becomes non-conducting, cuts off the current of field coil 851), and 2-41 alternator ε35 stops power generation. Conversely, if the potential of the power generation device control signal wiring 39 is high, the Δ alternator 8
A normal current flows through the field '1' coil 85b of No. 5, generating power. As mentioned above, the effects of this embodiment (and the effects of the first embodiment are almost the same, but in this embodiment, the mechanical operation 23 is mostly intact, and the back of the hand is small. [Effects of the present invention-1 The present invention LJ, -I Rotation of the retan-1 - part of the channel 1''. When used in a power generator IN that converts into an electric T channel, the electric load is suddenly and thickly added to the table. , and supply to the electrical load - generate 11 electricity needed for <r> i=me, 11 (1・sa1) life of the capacitor (
2 and ga i)-Idoi-) effect 1-j.

[Brief explanation of drawings]

Figure 1 shows the basic structure of the present invention, Figure 2 shows an example of the 171 river of the present invention, and Figure 3 shows the basic structure of the present invention. 1 actual h (schematic explanatory diagram of example U, Figure 4 LJ, 17i1 actual/+l!+ example microphone 1-1) 〜, FIG. 5 is the second embodiment of the present invention.
Fig. 6 is a circuit diagram around the W magnetic current reduction circuit of the 33rd embodiment of the present invention. n load-2
/l - M3...Electricity storage M4...Power generation 16M
F5... Rotation speed η111υ11 stage M6. ．． -EnnAnSail■7r■2M! '7...Power generation h1 control means 33...Electrical angle ('IFi 3/1...Microphone rl ml amplifier 35...
Device i ~ Ribicoater 37... "-Lethane 33B... Dingjin's intake system 38a... Solenoid valve/IO... Power generation 1mu j8 710a... Clutch 61 on electricity 1'4... gu■] engine 62...Δ, neutral 63...transmission (5/l...yu)*machine control) mu neck 8/1...field current reduction circuit ε35...Δ Luneta

Claims (1)

[Scope of Claims] 1. In a power generation amount control device used in a power generation device that supplies part of the rotational energy of an engine to various electric loads and converts it into electric energy to be stored in a power storage device, according to an increase in the electric load. a rotational speed control means for increasing the rotational speed of the engine according to a decrease in the electrical load and decreasing the rotational speed of the engine according to a decrease in the electrical load; an engine rotational speed detection means for detecting the rotational speed of the engine; and electric power generation control means that controls the reduction of the conversion rate from engine rotational energy to electrical energy only from the time when the engine rotational speed increases until the engine rotational speed detected by the engine rotational speed detection means increases to a predetermined value. Power generation control device. 2. The power generation amount control device according to claim 1, wherein the power generation amount control means includes an electromagnetic clutch that connects and disconnects transmission of rotation between the engine and the power generation device. 3. The power generation amount control device according to claim 1, wherein the power generation amount control means includes a transmission device capable of changing a gear ratio for transmission of rotation between the engine and the power generation device. 4. The power generation amount control device according to claim 1, wherein the power generation amount control means includes a device that controls the amount of current applied to the field coil of the power generation device.